Apparatus for controlling the flow of liquids



NW. 0 P E923. 11,474,894

J. w. DOBLE APPARATUS FOR CONTROLLING THE FLOW OF LIQUIDS Filed April 10, 1918 WITNESS IN VEN TOR.

A TTORNE Y6 Patented Nov. 2(3), i923.

earner JESSE WARREN DOBLE, UF SAN FRANCISCO, CALIFORNIA. ASSIGN OR TO DOFBELE 'LAEURA- TDRIE, OF SAN FRANCISCO, CALIFORNIA, A CORl0RATION O1 CALKEZORITKA.

AILPARATUS FOR CONTROLLING THE FLUVT 01 LIQUIDS.

Application filed April 10, 1918. Serial No. 227,787.

tain new and useful Apparatus "for Controh.

ling the Flow of Liquids, of which the following is a specification.

The invention relates to apparatus for controlling the flow of liquids and particularly to the control of liquids being pumped. The invention has particular application in controlling the iced or" water to steam generators by variation in conditions within the steam generator or other heat absorbing medium containing apparatus.

An object of the invention is to provide means for controlling" the pumping of liquid into a container in accordance with variations in conditions within the container.

Another object the invention is to provide means for stopping and starting the pumping of water into a Water heater or steam generator when the temperature therein reaches certain predetermined minimum and maximum limits.

invention sesses other advantageous "features, some ct which, with the loregoing will he set forth at length in the lollowing description. where l shall outline in full, that form of the invention which I have selected for illustration in the drawings accompanying and "forming part of the present specification. In said drawings have shown one form and one application of my invention but itis to he understood that, I do not limit myself to such form or application. since the invention, as set forth in the claims, may he embodied in a plurality of forms and applications.

Referring said drawings:

l igrure a diagrammatic representation oi the application of my invention to a steam generator.

Fig-are is i a longitudinal section through the pump or my invention.

Thepump oil-in invention. comprises pump body 2 having a pump chamber :1 therein into which the piston i. reciprocates. The chamber 3 is provided with outlet port t'i, preferably arranged at upper part oil-the chamber, and the flow or liquid into the pump chamber through thisport is prevented lay a suitahle check valve.,'such as the hall a. Liquid is drawn into the pump of the suction valve l2.

chamber from the supply tank I or other source of the supply through the port The infiowing liquid passage is provided with a vertically disposed portion 9 which opens into the port 8 and the flow of liquid through the passage 9 is controlled by the valve 12. arranged to seat on the upper end of the passage 9. The valve 12 norma acts as a check valve which is open on inc suction stroke of the piston and closed on the pumping stroke.

The valve 12 is provided with a stem 13 on its upper face which is guided in the cap 1 3: and with :1 depending stem 15 which is preferably provided with an enlarged portion 16 on its lower end. The weight of the valve and the stems is ordinarily sufficient to cause the valve to seat and prevent a reverse flow of liquid. Surrounding the enlarged portion 16 of the stem 15 is a solenoid 171' which controls the position or operation The solenoid preferably arranged so that when energized the suction valve is held from its seat, but it may also be arrange (0 boll "he valve to its seat. W hen the /e is he either of these positions the pump is inoperative.

in Figure l l have shown pump con nected to a steam generator and serving to feed water to the generator. The solenoid circuit is connected to temperature actuated means Within the generator so that operation of the suction valve is controlled by; variations in temperature conditions within the generator. Arranged in the solenoid circuit is a normally open switch one contact of which is carried by the flexed el' ment 19. Bearing against and flexing}: element is a lever @l. "iulcrumecl on support and pivoted to an expansible 22 arranged in the generator. As the perature in the n'enerator decreases. length of the rod is lessened and the pressure on the flexible element is lessen aillovling it to straighten out mov switch contacts toward each other.

predetermined low temperature re e switch closes energizing the solenoid holding the suction valve in position prevent the pumping of water; 0 the '1- erator. When the temperature in the orator subsequently rises the solenoid cireuit is opened and the suction valve is normal operative condition.

Zoo

pump piston is continuously reciprocated, but acts to pump water only when the suction valve is in its normal operative condition.

I claim:

1. ln combination. a pump. a steam generator arranged to be supplied with liquid from the pump. means for rendering the pump operative and inoperative to pump liquid. and means for controlling the temperature within the generator. comprising means responsive to temperature changes in the steam generator for controlling the means -for rendering the pump operative and inoperative.

2. ln ('r)lhl'1ll"ltlll()fl. a pump. a steam generator arranged to be supplied with liquid from the pump. means interposed between the pump and the generator for controlling the flow of liquid to the generator from the pump. said means being arranged to render the pump operative and inoperative to pump liquid. electromagnetic means for controlling said latter means. and means for controlling the temperature within the generator. comprising means responsive to temperature changes in the steam generator for controlling the operation of said electromagnetic means.

3. An apparatus for controlling the temperature within a steam generator comprising means for introducing a liquid into the generator. characterized by the fact that the means is rendered active or inactive to supply liquid solely by variations in the temperature of the steam whereby this temperature is kept within definite limits.

4. in an apparatus for controlling the temperature within a steam generator, means for introducing a liquid into the generator. and means controlling the latter means arranged to permit the entry of liquid at a definite temperature existing in the generator and to prevent entry of the liquid at a lower temperature.

5; in an apparatus for controlling the temperature Within a steam generator, a

continuously operated pump for introducing liquid into the generator, an inlet for the pump having a valve member that is arranged to be operated by the pump on its suetion'stroke to permit liquid to enter the pump. and means responsive to temperature changes within the generator for independently operating said member for disabling the pump.

6. An apparatus for controlling the temperature within a steam generator comprising a pump for introducing a liquid into the generator. and an inlet valve for the pump, characterized by the fact that the valve is operated. by variations in the temperature or the steam whereby this temperature is kept withindeh'nite limits.

7. In an apparatus for controlling the temperature within a steam generator, a continuously operated pump for introducing liquid into the generator, an inlet for the pump having a valve member that is arranged to be operated by the pump on its suction stroke to permit-liquid to enter the pump. electromagnetic means for independently operating said member for distill abling the pump. and means responsive to temperature changes within the generator for controllingsaid electromagnetic means.

8. In an apparatus for controlling the temperature within a steam generator, a pump for introducing liquid into the generator, an inlet valve for the pump, an electromagnet for operating the valve, and means for permitting the entry of liquid to the generator at a definite temperature and to prevent entry 0t liquid at a lower temperature, comprising means responsive to temperature within the generator for ener= gizing the electromagnet.

In testimony whereof, it have hereunto set ,m'y hand at San Francisco, California, this 29 day of March, 1918.

JESSE WAlttlPil lN DOBL'E. in presence ot J. B. Genome. 

